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Intel Pentium III 866 - RB80526PZ866256 (BX80526C866256 / BX80526C866256E)

CPU » Intel » Pentium III families » Pentium III (Coppermine) » RB80526PZ866256

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Intel Pentium III 866 MHz specifications

General information
TypeCPU / Microprocessor
Market segmentDesktop
FamilyIntel Pentium III
CPU part numbersRB80526PZ866256 is an OEM/tray microprocessor
BX80526C866256 is a boxed microprocessor
BX80526C866256E is a boxed microprocessor
Frequency  ? 866 MHz
Bus speed  ? 133 MHz
Clock multiplier  ? 6.5
Package370-pin Flip-Chip Pin Grid Array (FC-PGA)
1.95" x 1.95" (4.95 cm x 4.95 cm)
SocketSocket 370 / PGA370
Introduction dateMar 20, 2000
 
S-spec numbers
  ES/QS processors Production processors
Part number QAN4 QS82 QV42 SL43J SL49H SL4CB SL4MD SL4ZJ SL5DX
BX80526C866256    + +  
BX80526C866256E   +   ++
RB80526PZ866256++++ + ++
 
Architecture / Microarchitecture
MicroarchitectureP6
Processor core  ? Coppermine
Core steppings  ? cB0 (SL43J)
cC0 (SL4CB, SL4MD)
cD0 (SL4ZJ, SL5DX)
CPUIDs683 (SL43J)
686 (SL4CB, SL4MD)
68A (SL4ZJ, SL5DX)
Manufacturing process0.18 micron
28 million transistors
Data width32 bit
Data bus width64 bit
The number of cores1
The number of threads1
Floating Point UnitIntegrated
Level 1 cache size  ? 16 KB instruction cache
16 KB data cache
Level 2 cache size  ? Full-speed integrated 8-way set associative 256 KB
Features
  • MMX instructions
  • SSE / Streaming SIMD Extensions
Low power features
  • AutoHALT state  ? 
  • Stop Grant state  ? 
  • Sleep state  ? 
  • Deep Sleep state  ? 
  • System Management Mode
 
Electrical / Thermal parameters
Min/Recommended/Max V core1.57V / 1.65V / 1.69V
1.62V / 1.7V / 1.74V
1.67V / 1.75V / 1.79V
Minimum/Maximum operating temperature  ? 0°C - 80°C
Maximum power dissipation  ? 27.71 Watt (1.7V core)
30.8 Watt (1.75V core)
 
Notes on Intel RB80526PZ866256
  • The processor is usually marked as 866/256/133/1.65V, 866/256/133/1.7V or 866/256/133/1.75V, where the last number specifies processor's core voltage. If the processor is marked with RB80526PZ866256 part number then use processor specification number to identify processor's core voltage

CPUs, related to Intel Pentium III 866 MHz (RB80526PZ866256)

Model Freq. L2
cache		 Multi-
processing		 Features
Intel Pentium III (Coppermine) family, Socket 370
   Pentium III 733 MHz (RB80526PZ733256)733 MHz256 KB 
   Pentium III 750 MHz (RB80526PY750256)750 MHz256 KB 
   Pentium III 800 MHz (RB80526PY800256)800 MHz256 KB 
   Pentium III 800EB (Socket 370)800 MHz256 KB 
   Pentium III 850 MHz (RB80526PY850256)850 MHz256 KB 
   Pentium III 866 MHz (RB80526PZ866256)866 MHz256 KB 
   Pentium III 866 MHz (RK80526PZ866256)866 MHz256 KB 
   Pentium III 900 MHz (RB80526PY900256)900 MHz256 KB 
   Pentium III 933 MHz (RB80526PZ933256)933 MHz256 KB 
   Pentium III 933 MHz (RK80526PZ933256)933 MHz256 KB 
   Pentium III 1 GHz (RB80526PY001256)1 GHz256 KB 
   Pentium III 1BGHz (Socket 370)1 GHz256 KB 
   Pentium III 1BGHz (Socket 370)1 GHz256 KB 
   Pentium III 1.1 GHz (RB80526PY005256)1.1 GHz256 KB 
   Pentium III 1.13 GHz (RK80526PZ006256)1.13 GHz256 KB 
Intel Pentium III (Coppermine) family, P6 micro-architecture, Other sockets
   Pentium III 933 MHz (80526PZ933256)933 MHz256 KB2
   Pentium III 1 GHz (80526PY1000256)1 GHz256 KB2
   Pentium III 1BGHz (Slot 1)1 GHz256 KB2
Other families, P6 micro-architecture, Socket 370
   Celeron 1.3 GHz (RK80530RY013256)1.3 GHz256 KB 
   Pentium III 1.33 GHz (RK80530PZ014256)1.33 GHz256 KB1
   Celeron 1.4 GHz (RK80530RY017256)1.4 GHz256 KB 
   Pentium III 1.4 GHz (RK80530PZ017256)1.4 GHz256 KB1
   Pentium III 1.4GHz-S1.4 GHz512 KB2
   Celeron 1.5 GHz (RK80530RY021256)1.5 GHz256 KB 

 • Within each category, the CPUs are sorted from slower (at the top) to faster (at the bottom)

 • List of related CPUs is not complete.

Intel Pentium III 866 MHz Overclocking

Sorry, we do not have overclocking data for this microprocessor at this time.

Pictures (5)

866/256/133/1.65V

866 MHz
133 MHz bus
370-pin flip-chip PGA		 Intel Pentium III 866 - RB80526PZ866256 (BX80526C866256 / BX80526C866256E)
866/256/133/1.7V

866 MHz
133 MHz bus
370-pin flip-chip PGA		 Intel Pentium III 866 - RB80526PZ866256 (BX80526C866256 / BX80526C866256E)
866/256/133/1.7V SL4MD
2010-01-24 02:04:40
Posted by: tac

866/256/133/1.7V SL4MD 		866/256/133/1.7V SL4MD
 
2010-06-02 04:02:19
Posted by: Fuynfactory

  		 
Intel Pentium III 866Mhz 256K 133Mhz 1.7V SL4CB
2012-04-01 07:28:04
Posted by: Fuynfactory

  		Intel Pentium III 866Mhz 256K 133Mhz 1.7V SL4CB

Benchmarks

Benchmark tools

  • Compare Intel MII-300GP (66 MHZ 2.9V FCPGA) benchmark results with all tested CPUs from one of the following families:

  • To compare this Pentium III CPU with any tested processor please proceed to

Intel MII-300GP (66 MHZ 2.9V FCPGA) benchmarks

The graphs below show up to 10 processors with aproximately the same level of performance in different types of applications. All processors were tested at nominal frequency (not overclocked), with stock heatsink and default BIOS settings. To see how the MII-300GP (66 MHZ 2.9V FCPGA) compares to other CPUs please see benchmark tools section above.

Benchmarked processor

CPU ID:0683h
CPU vendor string:GenuineIntel

Integer performance

Part number   Result
AMD Duron 900MHz D900AUT1B  ? 
124.4%
AMD Athlon 850MHz A0850APT3B  ? 
118.4%
Intel Pentium III 1BGHz (Socket 370)  ? 
115.6%
Intel Pentium III 933MHz RB80526PZ933256  ? 
107.7%
AMD Athlon 750MHz A0750APT3B  ? 
104.3%
Intel Pentium III 866MHz RB80526PZ866256  ? 
100%
Intel Pentium III 800EB (Socket 370)  ? 
92.3%
AMD Athlon 650MHz AMD-K7650MTR51B C  ? 
89.7%
AMD Athlon 600MHz AMD-K7600MTR51B C  ? 
82.8%
Intel Pentium III 700MHz RB80526PY700256  ? 
80.7%
Intel Pentium III 667MHz RB80526PZ667256  ? 
76.8%

Floating Point performance

Part number   Result
Intel Pentium III 1BGHz (Socket 370)  ? 
115.6%
AMD Athlon 850MHz A0850APT3B  ? 
114.9%
Intel Pentium III 933MHz RB80526PZ933256  ? 
107.7%
Intel Celeron 1.6GHz RK80532RC025128  ? 
102.1%
AMD Athlon 750MHz A0750APT3B  ? 
101.3%
Intel Pentium III 866MHz RB80526PZ866256  ? 
100%
Intel Pentium III 800EB (Socket 370)  ? 
92.2%
AMD Athlon 650MHz AMD-K7650MTR51B C  ? 
87.1%
Intel Pentium III 700MHz RB80526PY700256  ? 
80.6%
AMD Athlon 600MHz K7600 (ES)  ? 
80.4%
AMD Athlon 600MHz AMD-K7600MTR51B C  ? 
80.4%

MMX / SSE / SSE2 performance

Part number   Result
Intel Pentium III 1BGHz (Socket 370)  ? 
115.6%
AMD Athlon 900MHz A0900AMT3B  ? 
108.6%
AMD Duron 900MHz D900AUT1B  ? 
108.5%
Intel Pentium III 933MHz RB80526PZ933256  ? 
107.7%
AMD Athlon 850MHz A0850APT3B  ? 
102.8%
Intel Pentium III 866MHz RB80526PZ866256  ? 
100%
Intel Pentium III 800EB (Socket 370)  ? 
92.3%
AMD Athlon 750MHz A0750APT3B  ? 
90.7%
Intel Pentium III 700MHz RB80526PY700256  ? 
80.7%
AMD Athlon 650MHz AMD-K7650MTR51B C  ? 
78.2%
Intel Pentium III 667MHz RB80526PZ667256  ? 
76.8%

CPU ID (2)

CPUID Tools

CPUID features of Pentium 3 866

NOTE: The CPU ID information below was taken from one CPU and may include features that are not present in all different steppings of the Intel Pentium 3 866 CPU.

Manufacturer:Intel
CPU Family:Pentium 3
Processor Number:866
Frequency:866 MHz
Part number:
RB80526PZ866256
S-Spec Number:SL4ZJ
Comment:
Submitted by:Neon
General information
Vendor:GenuineIntel
Processor type:Original OEM Processor
CPUID signature:68A
Family: 6 (06h)
Model: 8 (08h)
Stepping:10 (0Ah)
TLB/Cache details:Data TLB: 4-KB Pages, 4-way set associative, 64 entries
Data TLB: 4-MB Pages, 4-way set associative, 8 entries
Instruction TLB: 4-KB Pages, 4-way set associative, 32 entries
Instruction TLB: 4-MB Pages, fully associative, 2 entries

Cache: L1 data L1 instruction L2
Size: 16 KB 16 KB 256 KB
Associativity: 4-way set
associative		 4-way set
associative		 8-way set
associative
Line size: 32 bytes 32 bytes 32 bytes
 
Instruction set extensionsAdditional instructions
MMX CMOV
SSE CMPXCHG8B
  FXSAVE/FXRSTORE
  SYSENTER/SYSEXIT
 
Major featuresOther features
On-chip Floating Point Unit 36-bit page-size extensions
  Debugging extensions
  Machine check architecture
  Machine check exception
  Memory-type range registers
  Model-specific registers
  Page attribute table
  Page global extension
  Page-size extensions (4MB pages)
  Physical address extensions
  Processor serial number
  Time stamp counter
  Virtual 8086-mode enhancements

Comments (4)

Still useful

2006-11-03 08:09:24
Posted by: Jamie

I have one of these in my internet connection sharing host PC.

Despite being a bit out of date and below 1GHz, it's still pretty good (running WinXP Pro).

While out of date, if you have one and can use it, make use of it. They're still good for many things.

P-III 733

2007-04-21 02:54:36
Posted by: R. G. Findlay

I have a processor almost the same, only 733MHz, and it does run well... I can always recommend the P3 PGA Chips

Linux

2008-12-02 15:24:06
Posted by: TCTrad

I have this CPU in a compaq box with OpenSuse 10.2. Runs like hell! Very good CPU.

Linux

Still a pretty good processor

2009-01-10 20:15:36
Posted by: D

I Have a Windows 2000 Server Box That runs one of these. Pretty good for a "Vintage" Processor. Due to the fact this is a server (In which I keep and play most of My Media from.) I doesn't miss a beat keeping up to the network traffic I can subject this processor to. It never seems to slow or stagger. I have tried a Celeron 1.1 Ghz in this server and had some problems (Even though the clock speed is faster.) Over all I think this is a still viable processor to use for some purposes. While not the fastest in the world (even as Pentium III Coppermines go.)but I can always recommend the "Coppermine" Versions of the Pentium III still as a "Lower cost" solution.

Last modified: 8 May 2013
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